A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries
Sulfur cathode materials in lithium–sulfur chemistry suffer from poor electronic conductivity and shuttle of lithium polysulfides during charging and discharging. Serious shuttle effects and the sluggish redox reaction kinetics of polysulfides severely limit the development of lithium–sulfur batteri...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley-VCH
2023-06-01
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| Series: | Small Science |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/smsc.202300006 |
| _version_ | 1827920792755634176 |
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| author | Wenxin Liu Yuhang Chu Jinwei Zhou Xuanfeng Chen Yujie Wang Jinhui Li Feixiang Wu |
| author_facet | Wenxin Liu Yuhang Chu Jinwei Zhou Xuanfeng Chen Yujie Wang Jinhui Li Feixiang Wu |
| author_sort | Wenxin Liu |
| collection | DOAJ |
| description | Sulfur cathode materials in lithium–sulfur chemistry suffer from poor electronic conductivity and shuttle of lithium polysulfides during charging and discharging. Serious shuttle effects and the sluggish redox reaction kinetics of polysulfides severely limit the development of lithium–sulfur batteries with high sulfur loading, impeding the practical process of lithium–sulfur batteries. Herein, a honeycomb73x02010;structured CoF2@C is introduced as a functional layer adhered to the separator, achieving rapid lithium‐ion transport, high catalytic activity, and suppressed shuttle effect simultaneously. As a result, the cell with CoF2‐modified separator presents satisfactory cycle stability with a capacity decay of 0.076% per cycle within 300 cycles at 1 C rate with the sulfur loading of 2.0 mg cm−2. A low‐capacity decay of 0.088% per cycle for 200 cycles at 0.2 C is also achieved with sulfur loading of 3.0 mg cm−2. In addition, a high‐capacity retention of 697.5 mA g−1 is achieved with sulfur loading of 4.0 mg cm−2 and the electrolyte volume/sulfur mass (E/S) ratio of 8 μL mg−1. |
| first_indexed | 2024-03-13T04:16:48Z |
| format | Article |
| id | doaj.art-88dd089170d84c15986a4fa0bc48e217 |
| institution | Directory Open Access Journal |
| issn | 2688-4046 |
| language | English |
| last_indexed | 2024-03-13T04:16:48Z |
| publishDate | 2023-06-01 |
| publisher | Wiley-VCH |
| record_format | Article |
| series | Small Science |
| spelling | doaj.art-88dd089170d84c15986a4fa0bc48e2172023-06-21T00:42:44ZengWiley-VCHSmall Science2688-40462023-06-0136n/an/a10.1002/smsc.202300006A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur BatteriesWenxin Liu0Yuhang Chu1Jinwei Zhou2Xuanfeng Chen3Yujie Wang4Jinhui Li5Feixiang Wu6Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 ChinaFaculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 ChinaSchool of Metallurgy and Environment Central South University Changsha 410083 ChinaSchool of Metallurgy and Environment Central South University Changsha 410083 ChinaSchool of Metallurgy and Environment Central South University Changsha 410083 ChinaFaculty of Materials Metallurgy and Chemistry Jiangxi University of Science and Technology Ganzhou 341000 ChinaSchool of Metallurgy and Environment Central South University Changsha 410083 ChinaSulfur cathode materials in lithium–sulfur chemistry suffer from poor electronic conductivity and shuttle of lithium polysulfides during charging and discharging. Serious shuttle effects and the sluggish redox reaction kinetics of polysulfides severely limit the development of lithium–sulfur batteries with high sulfur loading, impeding the practical process of lithium–sulfur batteries. Herein, a honeycomb73x02010;structured CoF2@C is introduced as a functional layer adhered to the separator, achieving rapid lithium‐ion transport, high catalytic activity, and suppressed shuttle effect simultaneously. As a result, the cell with CoF2‐modified separator presents satisfactory cycle stability with a capacity decay of 0.076% per cycle within 300 cycles at 1 C rate with the sulfur loading of 2.0 mg cm−2. A low‐capacity decay of 0.088% per cycle for 200 cycles at 0.2 C is also achieved with sulfur loading of 3.0 mg cm−2. In addition, a high‐capacity retention of 697.5 mA g−1 is achieved with sulfur loading of 4.0 mg cm−2 and the electrolyte volume/sulfur mass (E/S) ratio of 8 μL mg−1.https://doi.org/10.1002/smsc.202300006cobalt fluoridelithium–sulfur batteriesmodified separatorspolysulfide shuttlesulfur cathodes |
| spellingShingle | Wenxin Liu Yuhang Chu Jinwei Zhou Xuanfeng Chen Yujie Wang Jinhui Li Feixiang Wu A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries Small Science cobalt fluoride lithium–sulfur batteries modified separators polysulfide shuttle sulfur cathodes |
| title | A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries |
| title_full | A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries |
| title_fullStr | A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries |
| title_full_unstemmed | A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries |
| title_short | A Honeycomb‐Structured CoF2‐Modified Separator Enabling High‐Performance Lithium−Sulfur Batteries |
| title_sort | honeycomb structured cof2 modified separator enabling high performance lithium sulfur batteries |
| topic | cobalt fluoride lithium–sulfur batteries modified separators polysulfide shuttle sulfur cathodes |
| url | https://doi.org/10.1002/smsc.202300006 |
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